Bold Subscriptions vs Booster Page Speed Optimizer
Head-to-head usage across the sites we track.
Top sites by authority
Bold Subscriptions · Booster Page Speed Optimizer · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Bold Subscriptions · Booster Page Speed Optimizer · share of sites in each country using one or the other
United States
1,438
2,898
India
182
1,454
United Kingdom
368
1,178
Canada
362
849
Australia
234
753
Germany
104
869
France
78
771
Italy
44
702
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Bold Subscriptions | Booster Page Speed Optimizer |
|---|---|---|
| LCP | 1.6 s | 1.8 s |
| INP | 75 ms | 100 ms |
| CLS | 0 | 0 |
| TTFB | 500 ms | 500 ms |
Median site's p75 values from the Chrome UX Report, Jun 2026. Lower is better; green meets Google's "good" threshold. This describes the sites that use each technology, not the technology's own overhead.
All Bold Subscriptions sites · All Booster Page Speed Optimizer sites